package com.ffzx.commerce.framework.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;
 

import javax.servlet.http.HttpServletRequest;

/**
 * IpUtil
 * 
 * @author CMM
 *
 * 2016年6月1日 上午10:21:45
 */
public class IpUtil {
	
	 /**
     * @param request IP
     * @return IP Address
     */
    public static String getIpAddrByRequest(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }
     
    /**
     * @return 本机IP
     * @throws SocketException
     */
    public static String getRealIp() throws SocketException {
        String localip = null;// 本地IP，如果没有配置外网IP则返回它
        String netip = null;// 外网IP
 
        Enumeration<NetworkInterface> netInterfaces = 
            NetworkInterface.getNetworkInterfaces();
        InetAddress ip = null;
        boolean finded = false;// 是否找到外网IP
        while (netInterfaces.hasMoreElements() && !finded) {
            NetworkInterface ni = netInterfaces.nextElement();
            Enumeration<InetAddress> address = ni.getInetAddresses();
            while (address.hasMoreElements()) {
                ip = address.nextElement();
                if (!ip.isSiteLocalAddress() 
                        && !ip.isLoopbackAddress() 
                        && ip.getHostAddress().indexOf(":") == -1) {// 外网IP
                    netip = ip.getHostAddress();
                    finded = true;
                    break;
                } else if (ip.isSiteLocalAddress() 
                        && !ip.isLoopbackAddress() 
                        && ip.getHostAddress().indexOf(":") == -1) {// 内网IP
                    localip = ip.getHostAddress();
                }
            }
        }
     
        if (netip != null && !"".equals(netip)) {
            return netip;
        } else {
            return localip;
        }
    }
    
    /**
     * 外网IP
     * @return
     */
	public static String getServerIp() {
		String SERVER_IP = null;
		try {
			Enumeration<NetworkInterface> netInterfaces = NetworkInterface
					.getNetworkInterfaces();
			InetAddress ip = null;
			while (netInterfaces.hasMoreElements()) {
				NetworkInterface ni = netInterfaces.nextElement();
				ip = (InetAddress) ni.getInetAddresses().nextElement();
				SERVER_IP = ip.getHostAddress();
				if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
						&& ip.getHostAddress().indexOf(":") == -1) {
					SERVER_IP = ip.getHostAddress();
					break;
				} else {
					ip = null;
				}
			}
		} catch (SocketException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return SERVER_IP;
	}

	/**
	 * 内网IP
	 * @return
	 */
	public static String getLocalIP() {
		InetAddress addr = null;
		try {
			addr = InetAddress.getLocalHost();
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		byte[] ipAddr = addr.getAddress();
		String ipAddrStr = "";
		for (int i = 0; i < ipAddr.length; i++) {
			if (i > 0) {
				ipAddrStr += ".";
			}
			ipAddrStr += ipAddr[i] & 0xFF;
		}
		// System.out.println(ipAddrStr);
		return ipAddrStr;
	}
}
